Window-sash lock



UNITED STATES PATENT OFFICE.

ALONZO C. ARNOLD, OF NORWALK, CONNECTICUT.

WINDOW-SASH LOCK.

Specication forming part of Letters Patent No. 50,321, dated October 10,1865.

To alt whom t may concern:

Be it known that I, ALONZO C. ARNOLD, ot the town of Norwalk, county ofFairfield, and State of Connecticut, have invented a new and usefulImprovement in the Mode of Constructing Window-Sash Locks; and I dohereby declare that the following is a correct description thereof,reference being had to the accompan ying drawings, and to the lettersot' reference marked thereon.

The nature of my invention consists in the arrangement of a spring-catchand rack and key to prevent the sash from being raised or lowered.

To enable others -skilled in the art to make and use my invention, Iwill proceed to describe the construction and operation.

In the drawings, Figure lis a view of a sashlrame with the sashes openeda small distance and aportion ot' the casing taken oft' to show theposition ot the locks when fixed for operation; Fig. 2, an enlarged viewot the lock and rack as it appears when locked, Fig. 3, an enlarged viewof the lock and rack as it appears when unlocked, Fig. 4, the face ot`the lock with the pin and key.

There are various ways of fastening and securing window-sashes.

My invention is a simple lock to prevent the sashes, when hung withweights and lines, being raised or lowered, except when allowed to do soby being unlocked by a key on the inside.

The drawings, Fig. l, describe the mode ot' fixing on the lock and rackand the manneriu which the spring pendantoatch enters the notch* of theserrated rack on the edge of the sash. The lock is let into the sidestile of the sash-frame Hush with the face, and the pin E passeshorizontally to the face ot' the inner liningot the frame, forming therea small keyhole for the insertion ofthe key E. (See Fig. 4.)

The lock is composed ot' the pendant-catch A, face-plate B, spring C,key-pin D, key E, and the serrated rack F. The rack F is let into theedge of each sash, as shown in the drawings. The notches ofthe rack ofthe lower sash being inverted willcatch against thepeudant A and preventits being raised higher than a given space, (see Fig. 1,) until it ispermitted to do so by means ot' the key E, which is to be inserted inthe small hole in the lining of the frame on the square end of the pinD, and turn the projection I of the pin D against the back part ot' thespace formed in the pendantcatch A, which will, when the said projectionI on the pin E is ina horizontal position, (see Fig. 3,) keep it in itsplace, and the pendant will remain flush with thei'ace ot' the frame andallow the sashes to rise aud l'all freely till the piu is again turnedto allow the spring c to force the pendant A forward, as in Fig. 2.While the projection I is in a vertical position, as at Fig. 2, thecatch will always remain in the notch ot' the rack and permit the sashto move only one way. The upper sash by the lock being reversed willoperate in the same manner as the lower one-that is, it cannot be pulleddown only the distance permitted by the lock.

This lock is intended principally for window sashes that are hung withweights, not to support the sash, (for the weights will do that,) but toprevent the opening ot' the sash at all, either up or down, only such adistance as may be required for the admission ot' air, or otherpurposes, and prevent the possibility ot' any person or burglar movingthe sash, either inside or out, in any case without the use of the keyE, which can be taken out and deposited aside for private convenience,same as the doorkey.

What I claim as my invention, and desire to secure by Letters Patent, is

The construction and arrangement of a windo w-sash lock in the mannerand for the purpose substantially as herein set forth and described.

ALONZO C. ARNOLD.

Witnesses:

WM. VINE, GEO. MARVIN.

